Visibility Issues

[Direfury]

Earlier in October I started working on a model, using a few seperate geosets for one weapon, since I can't animate for shit. Now then, the flail I made for this model of mine used one geoset for it's Stand, Walk, Stand Ready & Spell animations and two other geosets for it's Attack animations. The problem is, once I played the animations after fixing the geoset animations, one geoset wouldn't appear when it was supposed to, or appear at the beginning of an animation, before it was supposed to show up.

Now then, after I got frustrated with this project, I got rid of the folder holding this model. I want to try making this model again, any ideas on what I might have overlooked last time?